Multiarch (#2)

* init

* var for name

Author: AvinZarlez

.github/workflows/image-build.yml

@@ -5,6 +5,7 @@ on:
 
 env:
   USER: ${{secrets.DOCKER_USER}}
+  IMAGE_NAME: docker-test
 
 jobs:
   docker_build:
@@ -26,8 +27,8 @@ jobs:
           password: ${{secrets.DOCKER_PAT}}
       - name: Build and push
         run: |
-            docker build --tag ${{env.USER}}/docker-uname:${{matrix.arch}}  .
-            docker push ${{env.USER}}/docker-uname:${{matrix.arch}}
+            docker build --tag ${{env.USER}}/${{env.IMAGE_NAME}}:${{matrix.arch}} .
+            docker push ${{env.USER}}/${{env.IMAGE_NAME}}:${{matrix.arch}}
 
   docker_manifest:
     needs: docker_build
@@ -40,5 +41,27 @@ jobs:
           password: ${{secrets.DOCKER_PAT}}
       - name: Create and push manifest
         run: |
-            docker manifest create ${{env.USER}}/docker-uname ${{env.USER}}/docker-uname:amd64 ${{env.USER}}/docker-uname:arm64
-            docker manifest push ${{env.USER}}/docker-uname
+            docker manifest create ${{env.USER}}/${{env.IMAGE_NAME}} ${{env.USER}}/${{env.IMAGE_NAME}}:amd64 ${{env.USER}}/${{env.IMAGE_NAME}}:arm64
+            docker manifest push ${{env.USER}}/${{env.IMAGE_NAME}}
+
+  docker_test:
+    needs: docker_manifest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-24.04
+            arch: amd64
+          - os: ubuntu-24.04-arm
+            arch: arm64
+    steps:
+      - name: Run Docker and check output
+        run: |
+            docker run -d --name ${{env.IMAGE_NAME}} --rm ${{env.USER}}/${{env.IMAGE_NAME}}:latest
+            sleep 5 # Wait for the container to start
+            output=$(docker exec ${{env.IMAGE_NAME}} wget -qO- localhost:8080)
+            if [[ "$output" != "Hello from image NODE:, POD:, CPU PLATFORM:linux/${{matrix.arch}}" ]]; then
+              echo "Unexpected output: $output"
+              exit 1
+            fi
+            echo "Expected output received: $output"

Dockerfile

@@ -1,2 +1,19 @@
-FROM ubuntu:latest
-CMD echo -n "Architecture is " && uname -m
+#
+# Build: 1st stage
+#
+FROM golang:1.24-alpine AS builder
+WORKDIR /app
+COPY go.mod .
+COPY hello.go .
+RUN go build -o /hello && \
+    apk add --update --no-cache file && \
+    file /hello
+
+#
+# Release: 2nd stage
+#
+FROM alpine
+WORKDIR /
+COPY --from=builder /hello /hello
+RUN apk add --update --no-cache file
+CMD [ "/hello" ]

go.mod

@@ -0,0 +1,2 @@
+module example.com/arm
+go 1.21

hello.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"runtime"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello from image NODE:%s, POD:%s, CPU PLATFORM:%s/%s",
+		os.Getenv("NODE_NAME"), os.Getenv("POD_NAME"), runtime.GOOS, runtime.GOARCH)
+}
+
+func main() {
+	http.HandleFunc("/", handler)
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}